# SDR ASAA2016072617523

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 26, 2016
- Submitted: July 28, 2016
- Operation: Air carrier
- Aircraft: [N557AS](https://openairdocs.org/aircraft/N557AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35176
- Aircraft time: 38,840 hours, 11,451 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Plenum
- Part number: 22156292
- Condition: Delaminated
- Location: Heat Exchanger
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2016072617523

## Discrepancy

WHILE WORKING T/C 78121000,  HEAT EXCHANGER CLEANING FOUND THE RT AFT PLENUM DELAMINATED MIG-2C 40-0012871, 40-0012872 INITIALIZED. ACFT GROUNDED.  RT AFT HEAT EXCHANGER & PLENUM REMOVED, IAW AMM 21-51-03-000-805-002.  INSTALLED NEW RH AFT PLENUM WITH HEAT EXCHANGER, IAW AMM 21-51-03-400-804-002.  COMPLETED ACP STEP 3J & 3K ON TASK IAW AMM 21-51-03-400-804-002. NO LEAKS NOTED.

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